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首页> 外文期刊>American Journal of Analytical Chemistry >Salting-Out Assisted Liquid-Liquid Extraction Combined with HPLC for Quantitative Extraction of Trace Multiclass Pesticide Residues from Environmental Waters
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Salting-Out Assisted Liquid-Liquid Extraction Combined with HPLC for Quantitative Extraction of Trace Multiclass Pesticide Residues from Environmental Waters

机译：盐析辅助液 - 液萃取联合HPLC从环境水域进行量化提取痕量多标准农药残留量

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摘要

In this study, salting-out assisted liquid-liquid extraction combined with high performance liquid chromatography diode array detector (SALLE-HPLC-DAD) method was developed and validated for simultaneous analysis of carbaryl, atrazine, propazine, chlorothalonil, dimethametryn and terbutryn in environmental water samples. Parameters affecting the extraction efficiency such as type and volume of extraction solvent, sample volume, salt type and amount, centrifugation speed and time, and sample pH were optimized. Under the optimum extraction conditions the method was linear over the range of 10 - 100 μg/L (carbaryl), 8 - 100 μg/L (atarzine), 7 - 100 μg/L (propazine) and 9 - 100 μg/L (chlorothalonil, terbutryn and dimethametryn) with correlation coefficients (R2) between 0.99 and 0.999. Limits of detection and quantification ranged from 2.0 to 2.8 μg/L and 6.7 to 9.5 μg/L, respectively. The extraction recoveries obtained for ground, lake and river waters were in a range of 75.5% to 106.6%, with the intra-day and inter-day relative standard deviation lower than 3.4% for all the target analytes. All of the target analytes were not detected in these samples. Therefore, the proposed SALLE-HPLC-DAD method is simple, rapid, cheap and environmentally friendly for the determination of the aforementioned herbicides, insecticide and fungicide residues in environmental water samples.
机译：在该研究中，开发并验证了与高效液相色谱二极管阵列检测器（Salle-HPLC-DAD）方法组合的盐析辅助液 - 液 - 萃取和验证用于同时分析Carbaryl，尿嘧啶，丙嗪，氯洛尼洛尼洛，Dimethametryn和Terbutryn环境中的环境水样。影响提取效率的参数，例如萃取溶剂的类型和体积，样品体积，盐型和量，离心速度和时间，以及样品pH。在最佳提取条件下，该方法在10-100μg/ L（carbaryl），8-100μg/ L（奥加齐），7-100μg/ L（丙嗪）和9 - 100μg/ L（含量，Terbutryn和Dimethametryn），相关系数（R2）在0.99和0.999之间。检测和定量的限制分别为2.0至2.8μg/ L和6.7至9.5μg/ L。为地，湖泊和河水获得的提取回收率在75.5％至106.6％的范围内，其内部和日间相对标准偏差对所有目标分析物的3.4％低。在这些样品中未检测到所有靶分析物。因此，所提出的盐酸HPLC-DAD方法是简单，快速，廉价和环保的，用于测定环境水样中上述除草剂，杀虫剂和杀菌剂残留物。

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